The two microphones in the E-Max amplify sounds below 85 decibels, whichamplifies normal communication, range commands, and environmental sounds.Above 85 decibels, the microphones shut off for a split second to protectthe shooter's hearing.Two microphones - one in each cup - give the usertrue stereo sound and allow the user to identify the directional source ofa sound. Includes an integrated audio input jack allowing music to beplayed.